EP 3536443 B1 20201216 - TURBINE BLADE TIP RAIL FORMATION
Title (en)
TURBINE BLADE TIP RAIL FORMATION
Title (de)
TURBINENSCHAUFELSPITZENSCHIENENBILDUNG
Title (fr)
FORMATION DE RAIL D'EXTRÉMITÉ DE PALE DE TURBINE
Publication
Application
Priority
US 201815913185 A 20180306
Abstract (en)
[origin: EP3536443A1] Methods of forming or repairing a tip rail (150) of a turbine (106) are disclosed. One method may include repairing the tip rail (150), or adding material to form the tip rail (150), by laser (254) irradiating a wire material (252) with a laser (254) in an inert gas (262) in a vicinity of a tip plate (148). The laser (254) irradiating the wire material (252) includes modulated pulsing the laser (254) through: a warm up phase during which an on-power of the laser (254) is increased over time to a maximum target on-power, a melt and bond phase during which the wire material (252) is melted and during which the on-power is less than the maximum target on-power, and a stress releasing phase during which the on-power of the laser (254) is less than the on-power during the melt and bond phase. Exterior surface coatings (220) and/or TBC (222) may be sprayed onto the tip rail (150) to protect it.
IPC 8 full level
B23P 6/00 (2006.01)
CPC (source: EP US)
B23K 26/0006 (2013.01 - EP US); B23K 26/0622 (2015.10 - EP US); B23K 26/14 (2013.01 - EP US); B23K 26/147 (2013.01 - EP US); B23K 26/342 (2015.10 - EP US); B23K 26/60 (2015.10 - EP US); B23P 6/007 (2013.01 - EP US); F01D 5/005 (2013.01 - EP US); F01D 5/288 (2013.01 - EP); B23K 2101/001 (2018.07 - EP US); B23K 2103/26 (2018.07 - EP US); F05D 2230/234 (2013.01 - EP US); F05D 2230/40 (2013.01 - US); F05D 2230/80 (2013.01 - US); F05D 2230/90 (2013.01 - US); F05D 2240/307 (2013.01 - US); F05D 2300/175 (2013.01 - US); F05D 2300/611 (2013.01 - US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3536443 A1 20190911; EP 3536443 B1 20201216; EP 3778106 A1 20210217; EP 3778106 B1 20220126; US 10486272 B2 20191126; US 2019275618 A1 20190912
DOCDB simple family (application)
EP 19161139 A 20190306; EP 20197711 A 20190306; US 201815913185 A 20180306